OMG!!!! I have a g/f that knew a guy. He pierced his own and it DID fall off! I know that doesn't sound funny but she was a drug rep in the Neuro office I worked in and told me that story in the office and I literally SERIOUSLY fell out of my chair laughing.

That being said, no nips but my tongue would ache occasionally, something awful too. Extra Biotene helped so but I don't know what you would do for the ache there.
I have recently took it out because i had some dentist stuff done and while its way far back and i have a short shaft it still has rubbed the back of my bottom teeth to a blister. bleh.

I went through this when I had breast reduction surgery. I couldn't feel my left nipple at all for the first six months or so (I still can't feel most of either of my areolas 9 years later) and as feeling slowly came back I would have this random shooting pain, like being stabbed with a needle right through my nipple. It felt the same to less of an extreme when my piercings were healing. My doctor said there are thousands of nerve endings in nipples and at the time of piercing the nerves were invariably damaged in some way. As nerves heal they can cause sudden searing pain.